Staybolt structure



R. S. MENNIE. STAYBOLT STRUCTURE. APPLICATION FILED AUG.29. 1919.

Patented Oct. 5, 1920.

UNITED STATES PATENT OFFICE.

ROBERT S. MENNIE, OF CHICAGO, ILLINOIS, ASSIGNOR TO FLANNERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

STAYBOLT s'rrauoruan.

Specification of Letters Patent.

Patented Oct. 5, 1920.

Divided and this application filed August 29, 1919.. Serial No. 320,647.

T 0 all whom it may concern.

Be it known that I, ROBERT S. Mnnnrn, a citizen of Canada, and a residentof Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Staybolt Structures; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in staybolt structure for boilers,this application being a division of application for patent filed by me on the 5th day of Feb ruary 1916 and designated by Serial No. 76,333.

The object of my present invention is to provide a staybolt structure embodying a bearing sleeve of the flush type in which both the outer end of the bearing sleeve and its closure shall be located inwardly from the plane of the outer face of the boiler sheet whereby the outer face of the closure will be in the same plane as the outer face of the boiler sheet, and to so mount the sleeve and its closure that the same will eifectually withstand all strains and pressure to which they may be subjected.

lVith this and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

The accompanying drawing is a sectional view showing an embodiment of my invention.

1 represents an outer boiler sheet having an opening 2, which latter is counterbored, as at 3, in such manner as to provide an annular seat 4. located near the inner face of the sheet. Thus it will be seen that the inner portion of the opening 2 is appreciably less in diameter than is the diameter of the remaining portion of said opening.

A bearing sleeve 5 is passed through the opening 2 and is of sufficient length to project some distance beyond the inner face of the boiler sheet. The outer end of the sleeve 4 is provided with an annular, outwardly projecting flange or shoulder 6 disposed within the larger portion 3 of the opening 2 and rests against the annular shoulder 4.

The sleeve 5 is made with an interior curved or rounded face 7 Which constitutes a seat for the rounded head 8 at the outer end of a stay bolt 9, the inner end-of which latter will be secured to the inner boiler sheet as will be readily understood.

It will be observed that the outer end of the sleeve is mounted freely within the boiler" sheet, between the inner and outer faces thereof and that the mounting is such as to effectually withstand any inward pull which may be exerted by the staybolt.

The outer end of the bearing sleeve 5 is closed by a plate or closure 10 which rests against the outer h v end of said sleeve and the seat within the latter for the bolt head is so located that a clearance 11 will be provided between said bolt head and closure to accommodate the longitudinal play of the staybolt.

The plate or closure 10 may be of such thickness that when in position against the sleeve and within the outer portion of the openlng, its outer face will be substantially flush with the outer face of the boiler sheet. The peripheral portion of the plate or closure is beveled, as at 10, thereby forming (with the wall of the opening 2) a groove which is occupied by a welding alloy 12, and thus the plate or closure is integrally united by welding to the boiler sheet within the opening 2 and over the outer end of the bearing sleeve.

For the purpose of providing for the testing of the staybolt, the latter may be provided with a tell-tale hole 13 closed at 14 within the head 8 of the staybolt, and this tell-tale hole may extend to the inner end of the staybolt.

Having fully described by invention what I claim as new and desire to secure by Lettors-Patent, is

1. In a staybolt structure, the combination with a boiler sheet having an opening, of a bearing sleeve having its outer end seated within said opening, a staybolt having a head mounted in said sleeve, and a closure in said opening over the sleeve and secured to the boiler sheet.

2. In a staybolt structure, the combina tion with a boiler sheet having an opening, of a bearing sleeve having its outer end seated within said opening, a staybolt having a head mounted in said sleeve, a closure in said opening in the boiler sheet,

and a weld uniting said closure to the boiler sheet.

3.'In a staybolt'structure, the combination with a boiler sheet having an opening, of a bearing sleeve having its outer end seated Within said opening, a staybolt having a head mounted in said sleeve, a closure 1oca'ted Within said opening in the boiler sheet with its outer face approximately flush with the outer face of the boiler sheet, and a weld uniting theperiphe'ralportion of said closure to the boiler sheet.

4. In a staybolt structure, the combination with a boiler sheet provlded wlth an openlng, and an annular seat within sald opening between thefiresp'ective faces of the sheet, of a bearing sleeve having an annular shoulder at its outer end lnclosed wlthin the opening in the boiler sheet and resting against the annular seat therein, and a closure in said sleeve and secured to the boiler sheet.

5. In a staybolt structure, the combination with a boiler sheet provided with an opening, the Wall of which is formed with an annular shoulder, of a bearing sleeve havlng an annular shoulder resting against the annular shoulder in said opening, a stay bolt having a head mounted in said bearlng sleeve, and a closure for the outer end of said sleeve, said closure secured to the boiler sheet. r V

6. In a' staybolt structure, the combination with a boiler sheet provided with an opening, the wall of which is formed with an annular shoulder,rof a bearing sleeve having an annular shoulder at its outer end 

